OpenCloudOS-Kernel/arch/hexagon/mm/init.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Memory subsystem initialization for Hexagon
*
* Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
*/
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/memblock.h>
#include <asm/atomic.h>
#include <linux/highmem.h>
#include <asm/tlb.h>
#include <asm/sections.h>
#include <asm/vm_mmu.h>
/*
* Define a startpg just past the end of the kernel image and a lastpg
* that corresponds to the end of real or simulated platform memory.
*/
#define bootmem_startpg (PFN_UP(((unsigned long) _end) - PAGE_OFFSET + PHYS_OFFSET))
unsigned long bootmem_lastpg; /* Should be set by platform code */
unsigned long __phys_offset; /* physical kernel offset >> 12 */
/* Set as variable to limit PMD copies */
int max_kernel_seg = 0x303;
/* indicate pfn's of high memory */
unsigned long highstart_pfn, highend_pfn;
/* Default cache attribute for newly created page tables */
unsigned long _dflt_cache_att = CACHEDEF;
/*
* The current "generation" of kernel map, which should not roll
* over until Hell freezes over. Actual bound in years needs to be
* calculated to confirm.
*/
DEFINE_SPINLOCK(kmap_gen_lock);
/* checkpatch says don't init this to 0. */
unsigned long long kmap_generation;
/*
* mem_init - initializes memory
*
* Frees up bootmem
* Fixes up more stuff for HIGHMEM
* Calculates and displays memory available/used
*/
void __init mem_init(void)
{
/* No idea where this is actually declared. Seems to evade LXR. */
memblock: rename free_all_bootmem to memblock_free_all The conversion is done using sed -i 's@free_all_bootmem@memblock_free_all@' \ $(git grep -l free_all_bootmem) Link: http://lkml.kernel.org/r/1536927045-23536-26-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ley Foon Tan <lftan@altera.com> Cc: Mark Salter <msalter@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Serge Semin <fancer.lancer@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-10-31 06:09:30 +08:00
memblock_free_all();
/*
* To-Do: someone somewhere should wipe out the bootmem map
* after we're done?
*/
/*
* This can be moved to some more virtual-memory-specific
* initialization hook at some point. Set the init_mm
* descriptors "context" value to point to the initial
* kernel segment table's physical address.
*/
init_mm.context.ptbase = __pa(init_mm.pgd);
}
void sync_icache_dcache(pte_t pte)
{
unsigned long addr;
struct page *page;
page = pte_page(pte);
addr = (unsigned long) page_address(page);
__vmcache_idsync(addr, PAGE_SIZE);
}
/*
* In order to set up page allocator "nodes",
* somebody has to call free_area_init() for UMA.
*
* In this mode, we only have one pg_data_t
* structure: contig_mem_data.
*/
void __init paging_init(void)
{
mm: free_area_init: use maximal zone PFNs rather than zone sizes Currently, architectures that use free_area_init() to initialize memory map and node and zone structures need to calculate zone and hole sizes. We can use free_area_init_nodes() instead and let it detect the zone boundaries while the architectures will only have to supply the possible limits for the zones. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Hoan Tran <hoan@os.amperecomputing.com> [arm64] Reviewed-by: Baoquan He <bhe@redhat.com> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@kernel.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200412194859.12663-5-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-04 06:57:06 +08:00
unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
/*
* This is not particularly well documented anywhere, but
* give ZONE_NORMAL all the memory, including the big holes
* left by the kernel+bootmem_map which are already left as reserved
* in the bootmem_map; free_area_init should see those bits and
* adjust accordingly.
*/
mm: free_area_init: use maximal zone PFNs rather than zone sizes Currently, architectures that use free_area_init() to initialize memory map and node and zone structures need to calculate zone and hole sizes. We can use free_area_init_nodes() instead and let it detect the zone boundaries while the architectures will only have to supply the possible limits for the zones. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Hoan Tran <hoan@os.amperecomputing.com> [arm64] Reviewed-by: Baoquan He <bhe@redhat.com> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@kernel.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200412194859.12663-5-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-04 06:57:06 +08:00
max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
mm: free_area_init: use maximal zone PFNs rather than zone sizes Currently, architectures that use free_area_init() to initialize memory map and node and zone structures need to calculate zone and hole sizes. We can use free_area_init_nodes() instead and let it detect the zone boundaries while the architectures will only have to supply the possible limits for the zones. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Hoan Tran <hoan@os.amperecomputing.com> [arm64] Reviewed-by: Baoquan He <bhe@redhat.com> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@kernel.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200412194859.12663-5-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-04 06:57:06 +08:00
free_area_init(max_zone_pfn); /* sets up the zonelists and mem_map */
/*
* Start of high memory area. Will probably need something more
* fancy if we... get more fancy.
*/
high_memory = (void *)((bootmem_lastpg + 1) << PAGE_SHIFT);
}
#ifndef DMA_RESERVE
#define DMA_RESERVE (4)
#endif
#define DMA_CHUNKSIZE (1<<22)
#define DMA_RESERVED_BYTES (DMA_RESERVE * DMA_CHUNKSIZE)
/*
* Pick out the memory size. We look for mem=size,
* where size is "size[KkMm]"
*/
static int __init early_mem(char *p)
{
unsigned long size;
char *endp;
size = memparse(p, &endp);
bootmem_lastpg = PFN_DOWN(size);
return 0;
}
early_param("mem", early_mem);
size_t hexagon_coherent_pool_size = (size_t) (DMA_RESERVE << 22);
void __init setup_arch_memory(void)
{
/* XXX Todo: this probably should be cleaned up */
u32 *segtable = (u32 *) &swapper_pg_dir[0];
u32 *segtable_end;
/*
* Set up boot memory allocator
*
* The Gorman book also talks about these functions.
* This needs to change for highmem setups.
*/
/* Prior to this, bootmem_lastpg is actually mem size */
bootmem_lastpg += ARCH_PFN_OFFSET;
/* Memory size needs to be a multiple of 16M */
bootmem_lastpg = PFN_DOWN((bootmem_lastpg << PAGE_SHIFT) &
~((BIG_KERNEL_PAGE_SIZE) - 1));
memblock_add(PHYS_OFFSET,
(bootmem_lastpg - ARCH_PFN_OFFSET) << PAGE_SHIFT);
/* Reserve kernel text/data/bss */
memblock_reserve(PHYS_OFFSET,
(bootmem_startpg - ARCH_PFN_OFFSET) << PAGE_SHIFT);
/*
* Reserve the top DMA_RESERVE bytes of RAM for DMA (uncached)
* memory allocation
*/
max_low_pfn = bootmem_lastpg - PFN_DOWN(DMA_RESERVED_BYTES);
min_low_pfn = ARCH_PFN_OFFSET;
memblock_reserve(PFN_PHYS(max_low_pfn), DMA_RESERVED_BYTES);
printk(KERN_INFO "bootmem_startpg: 0x%08lx\n", bootmem_startpg);
printk(KERN_INFO "bootmem_lastpg: 0x%08lx\n", bootmem_lastpg);
printk(KERN_INFO "min_low_pfn: 0x%08lx\n", min_low_pfn);
printk(KERN_INFO "max_low_pfn: 0x%08lx\n", max_low_pfn);
/*
* The default VM page tables (will be) populated with
* VA=PA+PAGE_OFFSET mapping. We go in and invalidate entries
* higher than what we have memory for.
*/
/* this is pointer arithmetic; each entry covers 4MB */
segtable = segtable + (PAGE_OFFSET >> 22);
/* this actually only goes to the end of the first gig */
segtable_end = segtable + (1<<(30-22));
/*
* Move forward to the start of empty pages; take into account
* phys_offset shift.
*/
segtable += (bootmem_lastpg-ARCH_PFN_OFFSET)>>(22-PAGE_SHIFT);
{
int i;
for (i = 1 ; i <= DMA_RESERVE ; i++)
segtable[-i] = ((segtable[-i] & __HVM_PTE_PGMASK_4MB)
| __HVM_PTE_R | __HVM_PTE_W | __HVM_PTE_X
| __HEXAGON_C_UNC << 6
| __HVM_PDE_S_4MB);
}
printk(KERN_INFO "clearing segtable from %p to %p\n", segtable,
segtable_end);
while (segtable < (segtable_end-8))
*(segtable++) = __HVM_PDE_S_INVALID;
/* stop the pointer at the device I/O 4MB page */
printk(KERN_INFO "segtable = %p (should be equal to _K_io_map)\n",
segtable);
#if 0
/* Other half of the early device table from vm_init_segtable. */
printk(KERN_INFO "&_K_init_devicetable = 0x%08x\n",
(unsigned long) _K_init_devicetable-PAGE_OFFSET);
*segtable = ((u32) (unsigned long) _K_init_devicetable-PAGE_OFFSET) |
__HVM_PDE_S_4KB;
printk(KERN_INFO "*segtable = 0x%08x\n", *segtable);
#endif
/*
* The bootmem allocator seemingly just lives to feed memory
* to the paging system
*/
printk(KERN_INFO "PAGE_SIZE=%lu\n", PAGE_SIZE);
paging_init(); /* See Gorman Book, 2.3 */
/*
* At this point, the page allocator is kind of initialized, but
* apparently no pages are available (just like with the bootmem
* allocator), and need to be freed themselves via mem_init(),
* which is called by start_kernel() later on in the process
*/
}
hexagon/mm: enable ARCH_HAS_VM_GET_PAGE_PROT This enables ARCH_HAS_VM_GET_PAGE_PROT on the platform and exports standard vm_get_page_prot() implementation via DECLARE_VM_GET_PAGE_PROT, which looks up a private and static protection_map[] array. Subsequently all __SXXX and __PXXX macros can be dropped which are no longer needed. Link: https://lkml.kernel.org/r/20220711070600.2378316-13-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Brian Cain <bcain@quicinc.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Christoph Hellwig <hch@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-07-11 15:05:46 +08:00
static const pgprot_t protection_map[16] = {
[VM_NONE] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
CACHEDEF),
[VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_READ | CACHEDEF),
[VM_WRITE] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
CACHEDEF),
[VM_WRITE | VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_READ | CACHEDEF),
[VM_EXEC] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_EXECUTE | CACHEDEF),
[VM_EXEC | VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_EXECUTE | _PAGE_READ |
CACHEDEF),
[VM_EXEC | VM_WRITE] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_EXECUTE | CACHEDEF),
[VM_EXEC | VM_WRITE | VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_EXECUTE | _PAGE_READ |
CACHEDEF),
[VM_SHARED] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
CACHEDEF),
[VM_SHARED | VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_READ | CACHEDEF),
[VM_SHARED | VM_WRITE] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_WRITE | CACHEDEF),
[VM_SHARED | VM_WRITE | VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_READ | _PAGE_WRITE |
CACHEDEF),
[VM_SHARED | VM_EXEC] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_EXECUTE | CACHEDEF),
[VM_SHARED | VM_EXEC | VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_EXECUTE | _PAGE_READ |
CACHEDEF),
[VM_SHARED | VM_EXEC | VM_WRITE] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_EXECUTE | _PAGE_WRITE |
CACHEDEF),
[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = __pgprot(_PAGE_PRESENT | _PAGE_USER |
_PAGE_READ | _PAGE_EXECUTE |
_PAGE_WRITE | CACHEDEF)
};
DECLARE_VM_GET_PAGE_PROT